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![Richard Musiol](/assets/img/avatar_default.png)
The general policy for the current state of js/wasm is that it only has to support tests that are also supported by nacl. The test nilptr3.go makes assumptions about which nil checks can be removed. Since WebAssembly does not signal on reading a null pointer, all nil checks have to be explicit. Updates #18892 Change-Id: I06a687860b8d22ae26b1c391499c0f5183e4c485 Reviewed-on: https://go-review.googlesource.com/110096 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
156 lines
3.2 KiB
Go
156 lines
3.2 KiB
Go
// +build !nacl,!js
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// run
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// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test the compiler -linkobj flag.
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package main
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import (
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"fmt"
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"io/ioutil"
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"log"
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"os"
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"os/exec"
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"strings"
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)
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var pwd, tmpdir string
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func main() {
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dir, err := ioutil.TempDir("", "go-test-linkobj-")
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if err != nil {
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log.Fatal(err)
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}
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pwd, err = os.Getwd()
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if err != nil {
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log.Fatal(err)
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}
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if err := os.Chdir(dir); err != nil {
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os.RemoveAll(dir)
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log.Fatal(err)
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}
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tmpdir = dir
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writeFile("p1.go", `
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package p1
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func F() {
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println("hello from p1")
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}
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`)
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writeFile("p2.go", `
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package p2
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import "./p1"
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func F() {
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p1.F()
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println("hello from p2")
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}
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func main() {}
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`)
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writeFile("p3.go", `
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package main
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import "./p2"
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func main() {
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p2.F()
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println("hello from main")
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}
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`)
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// two rounds: once using normal objects, again using .a files (compile -pack).
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for round := 0; round < 2; round++ {
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pkg := "-pack=" + fmt.Sprint(round)
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// The compiler expects the files being read to have the right suffix.
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o := "o"
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if round == 1 {
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o = "a"
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}
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// inlining is disabled to make sure that the link objects contain needed code.
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run("go", "tool", "compile", pkg, "-D", ".", "-I", ".", "-l", "-o", "p1."+o, "-linkobj", "p1.lo", "p1.go")
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run("go", "tool", "compile", pkg, "-D", ".", "-I", ".", "-l", "-o", "p2."+o, "-linkobj", "p2.lo", "p2.go")
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run("go", "tool", "compile", pkg, "-D", ".", "-I", ".", "-l", "-o", "p3."+o, "-linkobj", "p3.lo", "p3.go")
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cp("p1."+o, "p1.oo")
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cp("p2."+o, "p2.oo")
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cp("p3."+o, "p3.oo")
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cp("p1.lo", "p1."+o)
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cp("p2.lo", "p2."+o)
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cp("p3.lo", "p3."+o)
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out := runFail("go", "tool", "link", "p2."+o)
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if !strings.Contains(out, "not package main") {
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fatalf("link p2.o failed but not for package main:\n%s", out)
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}
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run("go", "tool", "link", "-L", ".", "-o", "a.out.exe", "p3."+o)
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out = run("./a.out.exe")
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if !strings.Contains(out, "hello from p1\nhello from p2\nhello from main\n") {
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fatalf("running main, incorrect output:\n%s", out)
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}
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// ensure that mistaken future round can't use these
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os.Remove("p1.o")
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os.Remove("a.out.exe")
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}
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cleanup()
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}
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func run(args ...string) string {
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out, err := exec.Command(args[0], args[1:]...).CombinedOutput()
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if err != nil {
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fatalf("run %v: %s\n%s", args, err, out)
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}
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return string(out)
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}
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func runFail(args ...string) string {
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out, err := exec.Command(args[0], args[1:]...).CombinedOutput()
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if err == nil {
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fatalf("runFail %v: unexpected success!\n%s", args, err, out)
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}
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return string(out)
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}
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func cp(src, dst string) {
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data, err := ioutil.ReadFile(src)
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if err != nil {
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fatalf("%v", err)
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}
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err = ioutil.WriteFile(dst, data, 0666)
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if err != nil {
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fatalf("%v", err)
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}
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}
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func writeFile(name, data string) {
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err := ioutil.WriteFile(name, []byte(data), 0666)
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if err != nil {
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fatalf("%v", err)
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}
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}
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func cleanup() {
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const debug = false
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if debug {
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println("TMPDIR:", tmpdir)
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return
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}
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os.Chdir(pwd) // get out of tmpdir before removing it
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os.RemoveAll(tmpdir)
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}
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func fatalf(format string, args ...interface{}) {
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cleanup()
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log.Fatalf(format, args...)
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}
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